cobalt

cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin. Symbol 57Co.

cobalt 60 a radioisotope of cobalt, atomic mass 60, having a half-life of 5.27 years and a principal gamma ray energy of 1.33 MeV; used as a radiation therapy source. Symbol 60Co.

co·balt (Co),

(kō'bawlt),

A steel-gray metallic element, atomic no. 27, atomic wt. 58.93320; a bioelement and a constituent of vitamin B12; certain of its compounds are pigments, for example, cobalt blue.

[Ger. kobalt, goblin or evil spirit]

cobalt

/co·balt/ (Co) (ko´bawlt) a chemical element, at. no. 27. Inhalation of the dust can cause pneumoconiosis and exposure to the powder can cause dermatitis.

cobalt 60 a radioisotope of cobalt used in radiation therapy.

cobalt (Co)

[kō′bôlt]

Etymology: Ger, kobold, mine goblin

a metallic element that occurs in the minerals cobaltite, smaltite, and linnaeite. Its atomic number is 27. Its atomic mass is 58.93. Extensive deposits of cobalt minerals are found in Ontario, Canada. Pure cobalt is obtained by reducing the oxide with aluminum or carbon. It is used in special alloys, such as Alnico. Cobalt is a component of vitamin B12, is found in most common foods, and is readily absorbed by the GI tract. This element is common in the human diet, but the precise daily intake requirement is not known, and cobalt deficiency in humans has not been seen. Cobaltous chloride has been given to some patients with certain types of anemia because of cobalt's capacity to produce polycythemia. Accidental intoxication by cobaltous chloride, especially by children, may produce cyanosis, coma, and death. Some amounts of cobalt stimulate the production of erythropoietin, by a process not yet understood, but large doses depress erythrocyte production. The only disease for which the use of cobalt is still advocated is normochromic, normocytic anemia associated with renal failure. The radioisotope 60Co or cobalt-60 emits gamma rays and is often used as an encapsulated radiation source in the treatment of cancer.

cobalt

A metallic element (atomic number 27; atomic weight 58.93) critical to the formation of red cells, maintenance of neural tissue, and in certain metabolic reactions. Cobalt is the central ion in vitamin B12; it is present in dairy products, organ meats, shellfish and sea vegetables.

COBALT

Cardiology A clinical study–Continuous Infusion vs Double-Bolus Administration of Alteplase—designed to compare the effect on M&M of Pts undergoing AMI of accelerated–which has now become the standard administration of alteplase–over 90 mins, with 2 bolus doses of alteplase given 30 mins apart. See Alteplase. Cf GUSTO.

cobalt

a radioisotope of cobalt having a half-life of 270 days; used as a label for cyanocobalamin. Symbol 57Co.

cobalt-60

a radioisotope of cobalt having a half-life of 5.27 years and a principal gamma ray energy of 1.33 MeV; used as a radiation therapy source. Symbol 60Co.

cobalt nutritional deficiency

causes anorexia and poor weight gain. Identification of the disease is based on chemical analysis of pasture and soil and biochemical analysis of animal tissues and fluids. Called also enzootic marasmus, Grand Traverse disease and other regional names.

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